Valve.



W. E. COPITHORN.

VALVE. APPLICATION FILED FEB. I. 1915, LQFY@ v Patented Nom 9, 1915.

. /3 9 6 o 0 f W 'y W( y I 1 r i' ,LWN Llllffhl' J l @wwf/ZW, i l

WALTER E. COPITHORN, 0F NATICK, MASSACHUSETTS.

VALVE.

Application filed February 1` 1915.

valves and more particularly'to valves adapted for use in connection with pneumatic tires. In this type of valves means are provided which permit the attachment thereto` of a tube or pipe from an air pump and as the air is forced from the pump through said valve. said valve will be automatically7 opened by a predeterniined pressure of said air. permitting said air to enter the tire and as the pressure of the air from said pump decreases. said valve will be automaticailly closed. ln most. of the valves of this nature dependence is placed upon the pressure of the air within the tire together with the assistance of a spring to return the valve to a position against its seatfand to prevent the escape of air from said tire. A cap is usually secured to the'end of the valve tube merely to prevent Vdirt and dust from becoming lodged therein. Much annoyance is experienced from these valves, due to the small particles of dust and dirt becoming lodged between the valve and its scat which prevents a complete closing of the same and thus permits the air to escape from the tire.

rlhe object of the present invention is to eliminate the difficulties and objections above recited by providing a simple and inexpensive valve which may be automatically opened by the injection of air into the tire during the infiation thereof, but with provision for positively closing said valve after the desired pressure of air therein has been reached and thus insure the maintenance' of such a pressure during the operations and movements of the vehicle.

further object of the. invention to provide a valve 'of the above nature'embodied in a supplementary valve tube which may be quickly and easily attached to the valve tubes of other types while the "same are in place upon thevehiele and in place of the above mentioned cap. l

rl`he invention consists in the combination 'and arrangement of parts set forth in the following specification and particularly1 pointed out m tic claim.

Referring to the drawings: Figure 1 is an Specification of Letters Patent.

Patented Nov. 4D, 1915.

Serial No. 5.468.

enlarged longitudinal section; partly in elevation. of a tire valve embodying` my invention. Fig. Zisa transverse section. partly in elevation. taken on line 2 2 of Fig. 1. is a transverse section taken on line il) 3 3 of Fig. 1. Fig. l is an enlarged longi- .tudinalsectioln partly in elevationv` of a modified form of valve.

Like numerals refer to like parts throughout the several views'of the drawings. i

ln the drawings. 5 is the valve tube of one of the most common type of tire valve having screw-threads (5 formed at the outer end thereof for connection with an air pump, and a holeT extending longitudinally there- A supplementary valve tubeV S is attached to the outer end of the valve tube 5 preferablyY by screw-threads 9 engaging the threads (i of said tube.

The supplementary valve tube 8 is recessed at l0 for a considerable portion of its length. which recess extends from the thread Aor inner end of said tube toward the outer tened as at 15 to receive a wrench whereby the same may be screwed firmly to thc end of the tube A valve 'rod lo is arranged within the supplementary tube S to reciprocate longitudinally of'said tube in bearings 17 and 1S, said bearing 17 being forn'ied in the end of said supplementary tube outside of the shoulder 11, while the bearing 1S is formed in a disk 19 placed against the end of the tube tube t.

washer 23, preferably spherical and constructed of suitable resilient material such as rubber, or if desired lead may be used, is mounted upon the rod 16 against the collar 21 and upon the opposite side of said collar from the spring 22, said washer constituting the valve n'hich engages the shoulder or seat 1l oi' said supplementary casing and is yieldingly retained in contact with saidshoulder b v means of said spring.

The outer 'end of the rod 16 projects slightly beyond the outer en d of the casing or supplementary tube 8 and constitutes a tickler whereby said 'alve may be opened in case it has become stuck. The projecting end of said rod is screw-threaded at 24.

A cap 25 has scre\vtlne:nled engagement vvith thel threaded end ot' the rod 16, said lap having a knurled barrel 26 surrounding the end ot' said supplementary tube S and by means ot' which said cap may be turned to draw-said rod 16 outwardly and thus positively cause said valve or washer 23 to engage the seat 11.

To iniiate the tire to which the tube 5 is attached the cap 25 is removed from the rod 16 and the usual pump tube is attached to the end of the supplementary casing by means of the threads 27. The pressure of the air from the pump causes the valve 23 to move avvay from the seat 11 and thus compress the spring 22, said air passing through said supplementary tube through the passages 20 and the hole 7 in said'tube 5 into the tire. lpon the reduction of the air pres sure from thev pump. the spring 22 causes said valve to return to its position against the seat l1 and thus prevent. in the usual manner, the escape oi the air trom the tire.

`When suliicient air has been pumped into the tire, the pump tube is disconnected from the valve tube S and the cap 25 screwed to the valve rod 16 against the end of the tube 8 causing the collar 21 to compress the washer 23 against the seat 11, positively closing the valve and preventing any air from escaping.

therefrom.

In the construction illustrated in Fi .1, the valve mechanism of the alve tu e 5 must first. be removed before the supplementary tube with its valve can be attached thereto as the valve rod 16 projects into the hole 7 in said valve tube, which is prepared t0 contain said valve mechanism. i

In the form illustrated in Fig. @the tube 5 is identical with the tube 5 illustrated in Fig. 1. The supplementary tube 8 however of this form oi valve is made much shorter than the tube S, consequently there is not as unich room for the spring and said supplementary tube does not project as 'tar trom the end oi" the tube. 5 as in the first case. This construction necessitates the extension of the valve rod 16 into the tube 5 to a greater extent andl consequently the inner guide for said valve rod instead of being at the outer end ot' the tube 5 has been placed againsta shoulder 2S, which was utilized by the old valve mechanism of the tube 5.

The bearing tor the inner end ot' said rod 16 is preferably a cup-shaped washer 2f) having passages 30 therein adapted to permit the air to pass from the hole T through to the tire. A spring 22 encircles the rod 16 engagingl said cup-shaped ivasher 29 and a collar 21 secured to said rod, similar to the collar 21 as shou'n in Fig. 1, said spring being adapted to torce said collar 2l toward the outer end of the tube 8 and ycoincidentally compresses a resilient washer 23 against the seat 11 formed in the tube S. The outer end of the rod 16 is threaded as in Fig. 1 and to said end is secured a cap 25 having an extension 29 which projects into a hole 17 in the shouldered.portion of the tube 8.y

The operation of the valve in the Jform shown in Fig. 4 is similar to that of thevalve illustrated in F ig. 1.

Having thus described my invention 'What I claim and desire by Letters Patent to secure is: V

In combination a valve tube having a male threaded end, a supplen'lentary metal tube secured to the male threaded portion ot' said valve tube, said supplementary tube having a conical valve seat formed within and integral therewith and adjacent to the outer end of said supplementary tube, a valve formed of relatively softer metal than that composing said seat, a valve rod for said valve, a spring encircling saidrod and adapted to yieldingly retain said valve. against said Seat, and a cap tor said supplementary tube having screw-threzuled engagement with said rod and adapted to be operated to positively draw said valve against said seat.

In testimony whereof I have hereunto set my hand in presence of two subscribingwitnesses.

'WALTER l1i. coPITi-IoaN.

Witnesses CHARLES S. GooDING, SYDNEY E. TAFT. 

